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socket.rb
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socket.rb
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class SocketError < StandardError
end
class BasicSocket < IO
def self.do_not_reverse_lookup=(setting)
@no_reverse_lookup = setting
end
def self.do_not_reverse_lookup
@no_reverse_lookup ? true : false
end
def getsockopt(level, optname)
Socket::Foreign.getsockopt descriptor, level, optname
end
def setsockopt(level, optname, optval)
optval = 1 if optval == true
optval = 0 if optval == false
error = 0
case optval
when Fixnum then
MemoryPointer.new :socklen_t do |val|
val.write_int optval
error = Socket::Foreign.setsockopt(descriptor, level, optname, val,
val.size)
end
when String then
MemoryPointer.new optval.size do |val|
val.write_string optval
error = Socket::Foreign.setsockopt(descriptor, level, optname, val,
optval.size)
end
else
raise "socket option should be a String, a Fixnum, true, or false"
end
Errno.handle "Unable to set socket option" unless error == 0
return 0
end
end
class Socket < BasicSocket
module Constants
FFI.config_hash("socket").each do |name, value|
const_set name, value
end
families = FFI.config_hash('socket').select { |name,| name =~ /^AF_/ }
families = families.map { |name, value| [value, name] }
AF_TO_FAMILY = Hash[*families.flatten]
end
module Foreign
class AddrInfo < FFI::Struct
config("rbx.platform.addrinfo", :ai_flags, :ai_family, :ai_socktype,
:ai_protocol, :ai_addrlen, :ai_addr, :ai_canonname, :ai_next)
end
attach_function "accept", :accept, [:int, :pointer, :pointer], :int
attach_function "bind", :_bind, [:int, :pointer, :socklen_t], :int
attach_function "close", :close, [:int], :int
attach_function "connect", :_connect, [:int, :pointer, :socklen_t], :int
attach_function "listen", :listen, [:int, :int], :int
attach_function "socket", :socket, [:int, :int, :int], :int
attach_function "getsockopt", :_getsockopt,
[:int, :int, :int, :pointer, :pointer], :int
attach_function "setsockopt", :setsockopt,
[:int, :int, :int, :pointer, :socklen_t], :int
attach_function "gai_strerror", :gai_strerror, [:int], :string
attach_function "getaddrinfo", :_getaddrinfo,
[:string, :string, :pointer, :pointer], :int
attach_function "freeaddrinfo", :freeaddrinfo, [:pointer], :void
attach_function "getpeername", :_getpeername,
[:int, :pointer, :pointer], :int
attach_function "getsockname", :_getsockname,
[:int, :pointer, :pointer], :int
attach_function "socketpair", :socketpair,
[:int, :int, :int, :pointer], :int
attach_function "gethostname", :gethostname, [:pointer, :size_t], :int
attach_function "getservbyname", :getservbyname,
[:pointer, :pointer], :pointer
attach_function "htons", :htons, [:u_int16_t], :u_int16_t
attach_function "ntohs", :ntohs, [:u_int16_t], :u_int16_t
attach_function "ffi_getnameinfo", :_getnameinfo,
[:state, :pointer, :socklen_t, :int], :object
#attach_function "ffi_pack_sockaddr_un", :pack_sa_unix,
# [:state, :string], :object
def self.bind(descriptor, sockaddr)
MemoryPointer.new :char, sockaddr.length do |sockaddr_p|
sockaddr_p.write_string sockaddr, sockaddr.length
_bind descriptor, sockaddr_p, sockaddr.length
end
end
def self.connect(descriptor, sockaddr)
err = 0
MemoryPointer.new :char, sockaddr.length do |sockaddr_p|
sockaddr_p.write_string sockaddr, sockaddr.length
err = _connect descriptor, sockaddr_p, sockaddr.length
end
getsockopt(descriptor, Socket::SOL_SOCKET, Socket::SO_ERROR) if err < 0
err
end
def self.getsockopt(descriptor, level, optname)
MemoryPointer.new 256 do |val| # HACK magic number
MemoryPointer.new :socklen_t do |length|
length.write_int 256 # HACK magic number
err = Socket::Foreign._getsockopt descriptor, level, optname, val, length
Errno.handle "Unable to get socket option" unless err == 0
return val.read_string(length.read_int)
end
end
end
def self.getaddrinfo(host, service, family, socktype, protocol, flags)
hints = Socket::Foreign::AddrInfo.new
hints[:ai_family] = family
hints[:ai_socktype] = socktype
hints[:ai_protocol] = protocol
hints[:ai_flags] = flags
host = "" if host.nil?
if host.empty?
if (flags & Socket::AI_PASSIVE == 1) # Passive socket
family == Socket::AF_INET6 ? (host = "::") : (host = "0.0.0.0") # IPv6 or IPv4
else
family == Socket::AF_INET6 ? (host = "::1") : (host = "127.0.0.1")
end
end
res_p = MemoryPointer.new :pointer
err = _getaddrinfo host, service, hints.pointer, res_p
raise SocketError, Socket::Foreign.gai_strerror(err) unless err == 0
ptr = res_p.read_pointer
return [] unless ptr
res = Socket::Foreign::AddrInfo.new ptr
addrinfos = []
loop do
addrinfo = []
addrinfo << res[:ai_flags]
addrinfo << res[:ai_family]
addrinfo << res[:ai_socktype]
addrinfo << res[:ai_protocol]
addrinfo << res[:ai_addr].read_string(res[:ai_addrlen])
addrinfo << res[:ai_canonname]
addrinfos << addrinfo
break unless res[:ai_next]
res = Socket::Foreign::AddrInfo.new res[:ai_next]
end
return addrinfos
ensure
hints.free if hints
if res_p then
ptr = res_p.read_pointer
# Be sure to feed a legit pointer to freeaddrinfo
if ptr and !ptr.null?
Socket::Foreign.freeaddrinfo ptr
end
res_p.free
end
end
def self.getaddress(host)
addrinfos = Socket.getaddrinfo(host)
addrinfos.first[3]
end
def self.getnameinfo(sockaddr,
reverse_lookup = !BasicSocket.do_not_reverse_lookup)
name_info = []
value = nil
flags = 0
flags |= Socket::NI_NUMERICHOST unless reverse_lookup
MemoryPointer.new :char, sockaddr.length do |sockaddr_p|
sockaddr_p.write_string sockaddr, sockaddr.length
success, value = _getnameinfo sockaddr_p, sockaddr.length, flags
raise SocketError, value unless success
name_info[0] = Socket::Constants::AF_TO_FAMILY[value[0]]
name_info[1] = value[1]
name_info[2] = value[2]
name_info[3] = value[3]
end
name_info[2] = name_info[3] if name_info[2].nil?
name_info
end
def self.getpeername(descriptor)
MemoryPointer.new :char, 128 do |sockaddr_storage_p|
MemoryPointer.new :socklen_t do |len_p|
len_p.write_int 128
err = _getpeername descriptor, sockaddr_storage_p, len_p
Errno.handle 'getpeername(2)' unless err == 0
sockaddr_storage_p.read_string len_p.read_int
end
end
end
def self.getsockname(descriptor)
MemoryPointer.new :char, 128 do |sockaddr_storage_p|
MemoryPointer.new :socklen_t do |len_p|
len_p.write_int 128
err = _getsockname descriptor, sockaddr_storage_p, len_p
Errno.handle 'getsockname(2)' unless err == 0
sockaddr_storage_p.read_string len_p.read_int
end
end
end
def self.pack_sockaddr_in(name, port, type, flags)
hints = Socket::Foreign::AddrInfo.new
hints[:ai_family] = Socket::AF_UNSPEC
hints[:ai_socktype] = type
hints[:ai_flags] = flags
res_p = MemoryPointer.new :pointer
err = _getaddrinfo name, port, hints.pointer, res_p
raise SocketError, Socket::Foreign.gai_strerror(err) unless err == 0
return [] if res_p.read_pointer.null?
res = Socket::Foreign::AddrInfo.new res_p.read_pointer
return res[:ai_addr].read_string(res[:ai_addrlen])
ensure
hints.free if hints
if res_p then
ptr = res_p.read_pointer
freeaddrinfo ptr if ptr and not ptr.null?
res_p.free
end
end
def self.unpack_sockaddr_in(sockaddr, reverse_lookup)
family, port, host, ip = getnameinfo sockaddr, reverse_lookup
# On some systems this doesn't fail for families other than AF_INET(6)
# so we raise manually here.
raise ArgumentError, 'not an AF_INET/AF_INET6 sockaddr' unless family =~ /AF_INET/
return host, ip, port
end
end
module ListenAndAccept
def listen(backlog)
backlog = Type.coerce_to backlog, Fixnum, :to_int
err = Socket::Foreign.listen descriptor, backlog
Errno.handle 'listen(2)' unless err == 0
err
end
def accept
return if closed?
wait_til_readable
fd = nil
sockaddr = nil
MemoryPointer.new 1024 do |sockaddr_p| # HACK from MRI
MemoryPointer.new :int do |size_p|
fd = Socket::Foreign.accept descriptor, sockaddr_p, size_p
end
end
Errno.handle 'accept(2)' if fd < 0
socket = self.class.superclass.allocate
socket.send :from_descriptor, fd
end
end
include Socket::Constants
class SockAddr_In < FFI::Struct
config("rbx.platform.sockaddr_in", :sin_family, :sin_port, :sin_addr, :sin_zero)
def initialize(sockaddrin)
@p = MemoryPointer.new sockaddrin.size
@p.write_string(sockaddrin)
super(@p)
end
def to_s
@p.read_string(@p.size)
end
end
class SockAddr_Un < FFI::Struct
config("rbx.platform.sockaddr_un", :sun_family, :sun_path)
def initialize(filename = nil)
maxfnsize = self.size - ( FFI.config("sockaddr_un.sun_family.size") + 1 )
if(filename && filename.length > maxfnsize )
raise ArgumentError, "too long unix socket path (max: #{fnsize}bytes)"
end
@p = MemoryPointer.new self.size
if filename
@p.write_string( [Socket::AF_UNIX].pack("s") + filename )
end
super(@p)
end
def to_s
@p.read_string(self.size)
end
end if (FFI.config("sockaddr_un.sun_family.offset") && Socket.const_defined?(:AF_UNIX))
def self.getaddrinfo(host, service = nil, family = nil, socktype = nil,
protocol = nil, flags = nil)
host = '' if host.nil?
service = service.to_s if service
family ||= 0
socktype ||= 0
protocol ||= 0
flags ||= 0
addrinfos = Socket::Foreign.getaddrinfo(host, service, family, socktype,
protocol, flags)
addrinfos.map do |ai|
addrinfo = []
addrinfo << Socket::Constants::AF_TO_FAMILY[ai[1]]
sockaddr = Socket::Foreign::unpack_sockaddr_in ai[4], true
addrinfo << sockaddr.pop # port
addrinfo.concat sockaddr # hosts
addrinfo << ai[1]
addrinfo << ai[2]
addrinfo << ai[3]
addrinfo
end
end
def self.gethostname
MemoryPointer.new :char, 1024 do |mp| #magic number 1024 comes from MRI
Socket::Foreign.gethostname(mp, 1024) # same here
return mp.read_string
end
end
class Servent < FFI::Struct
config("rbx.platform.servent", :s_name, :s_aliases, :s_port, :s_proto)
def initialize(data)
@p = MemoryPointer.new data.size
@p.write_string(data)
super(@p)
end
def to_s
@p.read_string(size)
end
end
def self.getservbyname(service, proto='tcp')
MemoryPointer.new :char, service.length + 1 do |svc|
MemoryPointer.new :char, proto.length + 1 do |prot|
svc.write_string(service + "\0")
prot.write_string(proto + "\0")
fn = Socket::Foreign.getservbyname(svc, prot)
raise SocketError, "no such service #{service}/#{proto}" if fn.nil?
s = Servent.new(fn.read_string(Servent.size))
return Socket::Foreign.ntohs(s[:s_port])
end
end
end
def self.pack_sockaddr_in(port, host, type = Socket::SOCK_DGRAM, flags = 0)
host = "0.0.0.0" if host.empty?
Socket::Foreign.pack_sockaddr_in host.to_s, port.to_s, type, flags
end
def self.unpack_sockaddr_in(sockaddr)
host, address, port = Socket::Foreign.unpack_sockaddr_in sockaddr, false
return [port, address]
rescue SocketError => e
if e.message =~ /ai_family not supported/ then # HACK platform specific?
raise ArgumentError, 'not an AF_INET/AF_INET6 sockaddr'
else
raise e
end
end
def self.socketpair(domain, type, protocol)
MemoryPointer.new :int, 2 do |mp|
Socket::Foreign.socketpair(domain, type, protocol, mp)
fd0, fd1 = mp.read_array_of_int(2)
[ from_descriptor(fd0), from_descriptor(fd1) ]
end
end
class << self
alias_method :sockaddr_in, :pack_sockaddr_in
alias_method :pair, :socketpair
end
# Only define these methods if we support unix sockets
if self.const_defined?(:SockAddr_Un)
def self.pack_sockaddr_un(file)
SockAddr_Un.new(file).to_s
end
def self.unpack_sockaddr_un(addr)
if addr.length > FFI.config("sockaddr_un.sizeof")
raise TypeError, "too long sockaddr_un - #{addr.length} longer than #{FFI.config("sockaddr_un.sizeof")}"
end
struct = SockAddr_Un.new
struct.pointer.write_string(addr)
struct[:sun_path]
end
class << self
alias_method :sockaddr_un, :pack_sockaddr_un
end
end
def initialize(family, socket_type, protocol)
descriptor = Socket::Foreign.socket family, socket_type, protocol
Errno.handle 'socket(2)' if descriptor < 0
setup descriptor
end
def self.from_descriptor(fixnum)
sock = allocate()
sock.from_descriptor(fixnum)
return sock
end
def from_descriptor(fixnum)
setup(fixnum)
return self
end
end
class UNIXSocket < BasicSocket
attr_accessor :path
def initialize(path)
@path = path
unix_setup
end
private :initialize
def unix_setup(server = false)
syscall = 'socket(2)'
status = nil
sock = Socket::Foreign.socket Socket::Constants::AF_UNIX, Socket::Constants::SOCK_STREAM, 0
# TODO - Do we need to sync = true here?
setup sock, 'rw'
Errno.handle syscall if descriptor < 0
sockaddr = Socket.pack_sockaddr_un(@path)
if server then
syscall = 'bind(2)'
status = Socket::Foreign.bind descriptor, sockaddr
else
syscall = 'connect(2)'
status = Socket::Foreign.connect descriptor, sockaddr
end
if status < 0 then
Socket::Foreign.close descriptor
Errno.handle syscall
end
if server then
syscall = 'listen(2)'
status = Socket::Foreign.listen descriptor, 5
Errno.handle syscall if status < 0
end
return sock
end
private :unix_setup
def addr
sockaddr = Socket::Foreign.getsockname descriptor
_, sock_path = sockaddr.unpack('SZ*')
["AF_UNIX", sock_path]
end
def peeraddr
sockaddr = Socket::Foreign.getpeername descriptor
_, sock_path = sockaddr.unpack('SZ*')
["AF_UNIX", sock_path]
end
def from_descriptor(descriptor)
setup descriptor
self
end
private :from_descriptor
end
class UNIXServer < UNIXSocket
include Socket::ListenAndAccept
def initialize(path)
@path = path
unix_setup(true)
end
private :initialize
end
class IPSocket < BasicSocket
def self.getaddress(host)
Socket::Foreign.getaddress host
end
def addr
sockaddr = Socket::Foreign.getsockname descriptor
Socket::Foreign.getnameinfo sockaddr
end
def peeraddr
sockaddr = Socket::Foreign.getpeername descriptor
Socket::Foreign.getnameinfo sockaddr
end
end
class UDPSocket < IPSocket
def initialize
status = Socket::Foreign.socket Socket::AF_INET, Socket::SOCK_DGRAM, 0
Errno.handle 'socket(2)' if status < 0
setup status
end
def bind(host, port)
@host = host.to_s if host
@port = port.to_s if port
addrinfos = Socket::Foreign.getaddrinfo(@host,
@port,
Socket::AF_UNSPEC,
Socket::SOCK_DGRAM, 0, 0)
status = -1
addrinfos.each do |addrinfo|
flags, family, socket_type, protocol, sockaddr, canonname = addrinfo
status = Socket::Foreign.bind descriptor, sockaddr
syscall = 'bind(2)'
break if status >= 0
end
if status < 0
Errno.handle syscall
Socket::Foreign.close descriptor
end
status
end
def inspect
"#<#{self.class}:0x#{object_id.to_s(16)} #{@host}:#{@port}>"
end
end
class TCPSocket < IPSocket
def self.gethostbyname(hostname)
addrinfos = Socket.getaddrinfo(hostname)
hostname = addrinfos.first[2]
family = addrinfos.first[4]
addresses = []
alternatives = []
addrinfos.each do |a|
alternatives << a[2] unless a[2] == hostname
addresses << a[3] if a[4] == family
end
[hostname, alternatives.uniq, family] + addresses.uniq
end
def initialize(host, port)
@host = host
@port = port
tcp_setup @host, @port
end
private :initialize
def tcp_setup(remote_host, remote_service, local_host = nil,
local_service = nil, server = false)
status = nil
syscall = nil
remote_host = remote_host.to_s if remote_host
remote_service = remote_service.to_s if remote_service
flags = server ? Socket::AI_PASSIVE : 0
@remote_addrinfo = Socket::Foreign.getaddrinfo(remote_host,
remote_service,
Socket::AF_UNSPEC,
Socket::SOCK_STREAM, 0,
flags)
if server == false and (local_host or local_service) then
@local_addrinfo = Socket::Foreign.getaddrinfo(local_host,
local_service,
Socket::AF_UNSPEC,
Socket::SOCK_STREAM, 0, 0)
end
@remote_addrinfo.each do |addrinfo|
flags, family, socket_type, protocol, sockaddr, canonname = addrinfo
status = Socket::Foreign.socket family, socket_type, protocol
syscall = 'socket(2)'
setup status
next if descriptor < 0
if server then
status = 1
begin
setsockopt(Socket::Constants::SOL_SOCKET,
Socket::Constants::SO_REUSEADDR, true)
rescue SystemCallError
end
status = Socket::Foreign.bind descriptor, sockaddr
syscall = 'bind(2)'
else
if @local_addrinfo then
status = bind descriptor, @local_addrinfo.first[4]
syscall = 'bind(2)'
end
if status >= 0 then
status = Socket::Foreign.connect descriptor, sockaddr
syscall = 'connect(2)'
end
end
break if status >= 0
end
if status < 0
Errno.handle syscall
Socket::Foreign.close descriptor
end
if server then
err = Socket::Foreign.listen descriptor, 5
Errno.handle syscall unless err == 0
end
setup descriptor
end
private :tcp_setup
def from_descriptor(descriptor)
setup descriptor
self
end
private :from_descriptor
end
class TCPServer < TCPSocket
include Socket::ListenAndAccept
def initialize(host, port = nil)
if Fixnum === host and port.nil? then
port = host
host = nil
end
port = StringValue port unless port.__kind_of__ Fixnum
@host = host
@port = port
tcp_setup @host, @port, nil, nil, true
end
end